H$4\mathrm{.}7$ Consider a valve in a refrigeration system which uses ammonia as the refrigerant. The ammonia enters the valve at $\backslash (36^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ and $1\mathrm{.}5$ MPa and exits at $300$ kPa $.$ Assume steady state conditions, negligible kinetic and potential energy changes, and negligible heat transfer. Determine:

a$.$ quality of the ammonia at the valve exit

b$.$ temperature of the ammonia at the valve exit $\backslash (\backslash$left$[\{\}^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash$right$]\backslash )$